Motorola MC6805R Series User Manual

MC6805R2 AND MC6805R3
11.4.2 Switching Characteristics (VCC= +5.25 Vdc ±O.5 Vdc, VSS=O Vdc, TA=TL to TH
Characteristic
.Symbol Min
Typ
Max
Unit
Oscillator Frequency
fosc
0.4
-
4.2 MHz
Cycle Time (4/fos
c
)
t~yc
0.95
-
10 p's
INT. iNi'2. and TIMER Pulse Width
tWL. tWH
tCyc+ 250
- -
ns
RESET Pulse Width
tRWL
t~c+250
- - ns
INT Zero-Crossing Detection Input Frequency
flNT
0.03
-
1 kHz
External Clock Input Duty Cycle (EXTAU
-
40
50
60
%
Crystal Oscillator Start-Up Time*
-
-
- 100 ms
*
See Figure 7-5 for tYPical crystal parameters.
11.4.3 AID Converter Characteristics (VCC= +5.25 Vdc ±O.5 Vdc, VSS=O Vdc, TA=TL to TH
unless otherwise noted)
Min Typ Max
Unit
Comments
Resolution
8 8 8
Bits
Non-Linearity
-
-
± 1/2
LSB
For VRH=4.0 to 5.0 V and VRL =0 V
Quantizing Error
-
-
± 1/2
LSB
Conversion Range
VRL
-
VRH
V
VRH
-
-
VCC
V
AID accuracy may decrease proportionately as
VRL
VSS
-
0.2 V
VRH is reduced below 4.0 V. The sum of VRH and
VRL must not exceed
VCe.
Conversion Time
30 30
30
tcyc
Includes sampling time
Monotonicity
Inherent (within total error)
Zero Input Reading
00 00
01
hexadecimal
Vin=O
Ratiometric Reading
FE
FF
FF
hexadecimal
Vin =
VRH
Sample Time
5
5 5
tcyc
Sample/Hold Capacitance. Input
-
-
25
pF
Analog Input Voltage
VRL
-
VRH
V
Negative transients
on any analog lines (Pins 19-24)
are not allowed at any time during conversion
11-4

Motorola MC6805R Series Specifications

General

Brand	Motorola
Model	MC6805R Series
Category	Computer Hardware
Language	English